August 1, 2012.
The extraction of iodine from seawater is used as a means of analyzing the concentration and isotopic ratios of iodine at different locations in the ocean. This has practical applications in the testing of discharge from nuclear fuel reprocessing plants, tracing of ocean currents, and testing areas for potential environmental and health impacts. One of the current methods used is separation extraction involving chloroform (CHCl3). This method is lengthy (almost an hour per sample) and does not guarantee 100% recovery of the iodine in the water. This research seeks to optimize the existing protocol for efficiency while maintaining or improving recovery. We assessed each methodological change qualitatively using a color scale (I2 in CHCl3) and quantitatively using Inductively Coupled Plasma Mass Spectrometry (ICP‐MS).
Lawrence Livermore National Laboratory (LLNL)
This material is based upon work supported by the S.D. Bechtel, Jr. Foundation and by the National Science Foundation under Grant No. 0952013 and Grant No. 0934931. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the S.D. Bechtel, Jr. Foundation or the National Science Foundation. This project has also been made possible with support of the National Marine Sanctuary Foundation. The STAR program is administered by the Cal Poly Center for Excellence in Science and Mathematics Education (CESaME) on behalf of the California State University (CSU).